#include <stdio.h>
#include <stdlib.h>


int main()
{
  int i = 0;
  int sum = 0;
  for( ; i <= 100; i++ ){
    sum += i;
  }

  printf("result[1~100] sum is : %d\n", sum);
  printf("myenv: %s\n", getenv("myenv"));
}
